64 bit Audio Video capture

Hi all,
I am in the market for an Audio/Video capture device, I foolishly bought one from Amazon which not only did not support 16:9 but also was hideous to use. I bought Serif MoviePlus thinking it was the rubbish software. Amazon have intervened and so now I am looking for a 64 bit device that will capture what I see on the screen or what I hear from my hifi.
Any help will be gratefully accepted.
Thank you
Dave